For great maternity shots wear tighter clothing. You must be comfortable so that you aren’t self conscious but clothes that show off your great curvy figure are best. Tight in the belly shirts, or draping scarves and fabric across the body also looks great. Get creative. Use something that isn’t really clothing at all. Favorite scarf, curtains, nice sheets…the only limit is your imagination.
I also thought it would be nice to show the before and after of this particular shot. The difference between the two shots demonstrates both what creative tweeking you can do with colours and textures but also things that you can make magically disappear. So even if the clothes aren't perfect you can make them perfect later with a little help. See if you can spot the alteration I made to Kati's dress in photoshop. Not on a sewing machine.